(cf folded-dipole
41Antenna — Contents 1 Science and engineering 1.1 Technology 1.2 Biology …
42Log-periodic antenna — In telecommunication, a log periodic antenna (LP, also known as a log periodic array) is a broadband, multielement, unidirectional, narrow beam antenna that has impedance and radiation characteristics that are regularly repetitive as a… …
43Rhombic antenna — signal gathering action compared to other end fire, backfire and traveling wave types. A rhombic antenna is a broadband directional antenna co invented by Edmond Bruce and Harald Friis,[1] mostly commonly used in HF (high frequency, also called… …
44Mast radiator — A typical mast radiator in Chapel Hill, North Carolina. The high RF voltage on the mast can deliver a dangerous electrical shock to anyone touching it, so the base is surrounded by a fence to prevent access …
45Rubber Ducky antenna — on a transceiver The Rubber Ducky antenna (or Rubber Duck aerial) is an electrically short monopole antenna which functions somewhat like a base loaded whip antenna and is sealed in a rubber or plastic jacket to protect the antenna.[1]… …
46Earth exploration — Introduction the investigation of the surface of the Earth and of its interior. By the beginning of the 20th century most of the Earth s surface had been explored, at least superficially, except for the Arctic and Antarctic regions. Today the… …
47Horn antenna — Pyramidal microwave horn antenna, with a bandwidth of 0.8 to 18 GHz. A coaxial cable feedline attaches to the connector visible at top. This type is called a ridged horn; the curving fins visible inside the mouth of the horn increase the antenna… …
48Hemoglobin — Hemoglobin, human, adult (heterotetramer, (αβ)2) Structure of human hemoglobin. The protein s α and β subunits are in red and blue, and the iron containing heme groups in green. Fro …
49Nunavik — Not to be confused with the Canadian territory of Nunavut. Nunavik region Nunavik (Inuktitut: ᓄᓇᕕᒃ) comprises the northern third of the province of Quebec, Canada. Covering a land area of 443,684.71 km² (171,307.62 sq mi) north of the 55th… …
50Magnetotactic bacteria — (or MTB) are a polyphyletic group of bacteria discovered by Richard P. Blakemore in 1975, that orient along the magnetic field lines of Earth s magnetic field. To perform this task, these bacteria have organelles called magnetosomes that contain… …
